Imported PO files have no public URL but have a link at admin/content/files

Problem

Imported po files are treated as regular files, and so appear at admin/content/files. When they listed there they have a link, even though they do not have a public URL -by design. Clicking their link gives:

LogicException: PO files URL should not be public. in Drupal\locale\StreamWrapper\TranslationsStream->getExternalUrl() (line 55 of core/modules/locale/src/StreamWrapper/TranslationsStream.php).

file_create_url('translations://en.po')
Drupal\file\Plugin\views\field\File->renderLink('en.po', Object)

Solutions

1. Filter them out in the view, or
2. Soften the error, maybe returning an empty string instead of an Exception.